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UIPickerView 的 selectRow:inComponent:animated: 是否调用 pickerView:didSelectRow:inComponent: ？

发布于 2024-11-28 18:05:17 字数 141 浏览 1 评论 0原文

UIPickerView的selectRow:inComponent:animated:是否调用pickerView:didSelectRow:inComponent:？不然我自己调用可以吗？

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诗笺 2024-12-05 18:05:17

您必须手动调用它，并通过委托来完成。

// In this example the UIPickerView object is in a property
...
self.pickerView.datasource = self;
self.pickerView.delegate = self;

// Selects the row in the specified component
[self.pickerView selectRow:0 inComponent:0 animated:NO];

// Manually calls pickerView:didSelectRow:inComponent:
[self pickerView:self.pickerView didSelectRow:0 inComponent:0];

You do have to call it manually and you do it though the delegate.

// In this example the UIPickerView object is in a property
...
self.pickerView.datasource = self;
self.pickerView.delegate = self;

// Selects the row in the specified component
[self.pickerView selectRow:0 inComponent:0 animated:NO];

// Manually calls pickerView:didSelectRow:inComponent:
[self pickerView:self.pickerView didSelectRow:0 inComponent:0];

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撧情箌佬 2024-12-05 18:05:17

尽管可以手动调用它，但它不会。

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柒夜笙歌凉 2024-12-05 18:05:17

它也不会使用 swift 调用委托方法，但您也可以手动执行。针对 swift 3 和 swift 4 的决定：

self.pickerView.datasource = self
self.pickerView.delegate = self

self.pickerView.selectRow(0, inComponent: 0, animated: false)
self.pickerView.delegate?.pickerView?(self.pickerView, didSelectRow: 0, inComponent: 0)

It does not call delegate method with swift too, but you can do it manually also. Decision for swift 3 and swift 4:

self.pickerView.datasource = self
self.pickerView.delegate = self

self.pickerView.selectRow(0, inComponent: 0, animated: false)
self.pickerView.delegate?.pickerView?(self.pickerView, didSelectRow: 0, inComponent: 0)

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